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csim dsim estimates

Eric BeckerMar 18 2017 — edited Mar 27 2017

I ran vdbench with compratio 3, dedupratio 3, and dedupunit 4k across a number of slaves (rdpct 0 seekpct eof). If I run dsim it reflects 1:0 dedup .

worker1:~# /opt/vdbench/current/vdbench dsim -u 4k /dev/sdb

20:17:34.352 Reads done:              141,312 (of xfersize 1048576)

20:17:34.352 Blocks_hashed:        18,087,936 (of dedupunit 8192)

20:17:34.352 Hash size:            18,087,936

20:17:34.352 Dedup sets:                    0

20:17:34.352 Duplicate blocks:              0

20:17:34.352 Unique blocks:        18,087,936

20:17:34.352

20:17:34.353 Totals: Dedup ratio: 1.00:1 (1.00000) Files read:      1; Reads done:      141,312; mb/sec: 145.71

If I run csim it refects ~5.85:1 compression.

worker1:~# /opt/vdbench/current/vdbench csim /dev/sdb

22:04:30.549

22:04:32.926 /dev/sdb size:   138g samples:  1131 in: 141.4m out:  24.3m pct:  17.2 compratio:    5.83:1

I expected something close v to 3:1 on both.  Am I running this incorrectly?

This post has been answered by Henk Vandenbergh-Oracle on Mar 20 2017
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